Plate stacking device (1; 101) comprising a vertical column (2; 102) with one or more side faces (4A, 4B; 103) provided with plate supports (3; 104). Each plate support comprises two upper projections (5; 105) horizontally in line with each other, and a lower projection (6; 106) which is longer than the two upper projections and which lies at a distance below the two upper projections. The upper projections (5; 105) projecting from a side face (4A, 4B; 103) are lateral extensions of adjacent column walls (4A, 4B; 116, 117).